University of Namur

  • Belgium

Research Output 1964 2019

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Working paper
Open Access
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Minimizing convex quadratics with variable precision Krylov methods

Gratton, S., Simon, E. & Toint, P. 2018 (Submitted) Arxiv, 26 p.

Research output: Working paper

File
Krylov Methods
Quadratic Optimization
Cross product
Matrix Product
Conjugate Gradient
2017

A note on using performance and data profiles for training algorithms

Porcelli, M. & Toint, P. 26 Nov 2017 (Submitted) Arxiv, 8 p.(naXys technical report)

Research output: Working paper

File
Training Algorithm
Benchmarking
Derivatives
Derivative-free
Profile

Buy as You Need: Nutrition and Food Storage Imperfections

Gross, J., Guirkinger, C. & Platteau, JP. 11 Sep 2017 (CEPR Discussion Paper; no. DP12264)

Research output: Working paper

Food
Nutrition
Imperfections
Food markets
Activation
Open Access
File
Function evaluation
Unconstrained Optimization
Adaptive algorithms
Nonlinear Optimization
Tensors

New Economics Papers Entrepreneurship

Dejardin, M. 2017

Research output: Working paper

Entrepreneurship
Economics

On the use of the saddle formulation in weakly-constrained 4D-VAR data assimilation

Gratton, S., Gürol, S., Simon, E. & Toint, P. 20 Sep 2017 (Submitted) Arxiv

Research output: Working paper

File
Data Assimilation
Saddle
Parallel processing systems
data assimilation
parallel computing
File
Nonconvex Optimization
Constrained optimization
Constrained Optimization
Optimality
Criticality
File
Constrained optimization
Constrained Optimization
Singularity
Objective function
Regularization

Working long hours: less productive but less costly? Firm-level evidence from Belgium

Delmez, F. & Vandenberghe, V. 2017 33 p.(IRES Discussion Papers; no. 2017-22)

Research output: Working paper

Open Access
File
Labour costs
Belgium
Productivity
Working hours
Workers

Worst-case evaluation complexity and optimality of second-order methods for nonconvex smooth optimization

Cartis, C., Gould, N. I. M. & Toint, P. 22 Sep 2017 Arxiv, 35 p.

Research output: Working paper

File
Newton-Raphson method
Optimality
Optimization
Function evaluation
Evaluation
2016
Open Access

Households in Times of War: Adaptation Strategies during the Nepal Civil War

Libois, F. 2016 CRED, 68 p.(CRED working paper)

Research output: Working paper

caste
Nepal
civil war
income
living standard

Quantifying the degree of average contraction of Collatz orbits

Carletti, T. & Fanelli, D. 21 Dec 2016 (Submitted) Namur center for complex systems, 18 p.

Research output: Working paper

File
Contraction
Orbit
Modulo
Integer
Iterate

Disruptive innovation and competition policy enforcement

De Streel, A. & LAROUCHE, P. 2015 OCDE, 14 p.(Directorate for financial and enterprise affairs competition committee)

Research output: Working paper

Evaluation complexity bounds for smooth constrained nonlinear optimization using scaled KKT conditions and high-order models

Cartis, C., Gould, N. I. M. & Toint, P. 17 Oct 2015 (Submitted) Namur center for complex systems, 20 p.(naXys technical report)

Research output: Working paper

File
KKT Conditions
Constrained Optimization
Nonlinear Optimization
Higher Order
Derivatives
File
Euclidean norm
Higher Order
Local Minimizer
Vector-valued Functions
Taylor series
Decision theory
Adaptive systems
Systems engineering
Requirements engineering
Specifications
Yield spread
Asset prices
Surprise
Credit rating
Price dynamics
File
Euro area
Yield spread
Alignment
Politicians
Investors

Worst-case evaluation complexity for unconstrained nonlinear optimization using high-order regularized models

Birgin, E., Gardenghi, J., Martinez, J-M., Santos, S. A. & Toint, P. Jun 2015 2015: Namur center for complex systems, 8 p.(naXys Technical Reports; vol. 05-2015)

Research output: Working paper

File
Unconstrained Optimization
Nonlinear Optimization
Higher Order
Derivatives
Derivative
File
Interior Point
Nonlinear Optimization
Matrix Derivative
Merit Function
Quadratic Optimization